<!-- Thank you for filing this! Please read the [debugging tips](https://github.com/gfx-rs/wgpu/wiki/Debugging-wgpu-Applications). That may let you investigate on your own, or provide additional information that helps us to assist.--> **Description** Unable to add HLSL_DXIL_SHADER_PASSTHROUGH to device features. **Repro steps** Create a DX12 device with HLSL_DXIL_SHADER_PASSTHROUGH as one of the features. **Expected vs observed behavior** It panics with a message saying that the feature is unsupported, I expect it to not throw an error and continue. **Platform** Linux with wine, using branch trunk.